Contains object parameters that are updated after the event happened. The array contains one entry per changed parameter. The entry key is the action log parameter name, and the entry value is the old value of the parameter.

Contains object parameters that are updated after the event happened (one entry per changed parameter). The set of keys in this array will be exactly the same as for $oldValues. The entry key is the action log parameter name, and the entry value is the new value of the parameter.

Notes:1. Some parameters appear in both arrays for informational purposes even if unchanged. 2. All parameters values are stored as strings. For instance, the value of a boolean parameter is the true or false string.